MIDDLE COLLEGE HIGH SCHOOL
... increase in the rate of the forward reaction? (1) increasing the concentration of NO(g) (2) increasing the concentration of N2(g) (3) decreasing the reaction temperature (4) decreasing the reaction pressure 37. Given the system at equilibrium: N2O4(g) + 58.1 kJ 2 NO2(g) What will be the result of an ...
... increase in the rate of the forward reaction? (1) increasing the concentration of NO(g) (2) increasing the concentration of N2(g) (3) decreasing the reaction temperature (4) decreasing the reaction pressure 37. Given the system at equilibrium: N2O4(g) + 58.1 kJ 2 NO2(g) What will be the result of an ...
Electrochemistry Oxidation – Reduction and Oxidation Numbers
... state of –2. (Peroxides are the exception, in which case the oxidation number is –1.) 6. Hydrogen in a compound or ion usually has an oxidation state of +1. (Hydrides are the exception, in which case the oxidation number is –1.) 7. For covalently bonded substances, shared electrons are assigned to t ...
... state of –2. (Peroxides are the exception, in which case the oxidation number is –1.) 6. Hydrogen in a compound or ion usually has an oxidation state of +1. (Hydrides are the exception, in which case the oxidation number is –1.) 7. For covalently bonded substances, shared electrons are assigned to t ...
2.4 Chemical equilibria
... Adding a catalyst makes absolutely no difference to the position of equilibrium, and Le Chatelier's Principle doesn't apply to them. This is because a catalyst speeds up the forward and back reaction to the same extent. Because adding a catalyst doesn't affect the relative rates of the two reactions ...
... Adding a catalyst makes absolutely no difference to the position of equilibrium, and Le Chatelier's Principle doesn't apply to them. This is because a catalyst speeds up the forward and back reaction to the same extent. Because adding a catalyst doesn't affect the relative rates of the two reactions ...
Chapter 3. Stoichiometry
... in the laboratory versus the number of moles required by stoichiometry. • Students do not appreciate that the coefficients in an empirical formula are not exact whole numbers because of experimental or round-off errors. In general, students have problems with the existence of experimental error. • T ...
... in the laboratory versus the number of moles required by stoichiometry. • Students do not appreciate that the coefficients in an empirical formula are not exact whole numbers because of experimental or round-off errors. In general, students have problems with the existence of experimental error. • T ...
Atoms, Molecules, and Ions
... logarithms, quadratics, and algebraic equations, is essential to success in this course (calculus is not required). You should not be taking remedial algebra concurrently with this course. Topics included are atomic structure, electronic structure and chemical bonding, descriptive solution chemistry ...
... logarithms, quadratics, and algebraic equations, is essential to success in this course (calculus is not required). You should not be taking remedial algebra concurrently with this course. Topics included are atomic structure, electronic structure and chemical bonding, descriptive solution chemistry ...
half-reactions - Clayton State University
... Nonspontaneous Process - Requires something to be applied in order for it to occur (usually in the form of energy) ...
... Nonspontaneous Process - Requires something to be applied in order for it to occur (usually in the form of energy) ...
Name……………………………………............................. Index number
... (b)Use dots ( ) and crosses (x) to show bonding in the compound formed in (a) above. (1mark) ...
... (b)Use dots ( ) and crosses (x) to show bonding in the compound formed in (a) above. (1mark) ...
Chemistry A - Montgomery County Public Schools
... identify traditional nomenclature (-ic and -ous suffixes). (H) name straight chain organic compounds (alkanes through decane). write symbols to represent elements, including diatomic elements, given a periodic table. Reactions transpose word equations into symbolic chemical equations and vic ...
... identify traditional nomenclature (-ic and -ous suffixes). (H) name straight chain organic compounds (alkanes through decane). write symbols to represent elements, including diatomic elements, given a periodic table. Reactions transpose word equations into symbolic chemical equations and vic ...
South Pasadena • AP Chemistry
... double replacement reaction, one of the products of the reaction is… a) H2 d) BaH2 b) H2O e) SO2 c) BaS 12. In the double replacement reaction between the weak acid, HC2H3O2 and strong base, NaOH, which ion(s) are spectator ions? a) Na+, C2H3O2– d) H+, C2H3O2– b) Na+, OH– ...
... double replacement reaction, one of the products of the reaction is… a) H2 d) BaH2 b) H2O e) SO2 c) BaS 12. In the double replacement reaction between the weak acid, HC2H3O2 and strong base, NaOH, which ion(s) are spectator ions? a) Na+, C2H3O2– d) H+, C2H3O2– b) Na+, OH– ...
Chapter 4: Solution Chemistry and the Hydrosphere
... Conjugate acid-base pairs: a Brønsted-Lowry acid/base and its conjugate differ by a H+ HA(aq) + H2O(l) ⇄ H3O+(aq) + A–(aq) • For the reaction above, when HA donates H+ to H2O, it leaves behind A–, which can act as a base for the reverse reaction. • An acid and base that differ only by the presence o ...
... Conjugate acid-base pairs: a Brønsted-Lowry acid/base and its conjugate differ by a H+ HA(aq) + H2O(l) ⇄ H3O+(aq) + A–(aq) • For the reaction above, when HA donates H+ to H2O, it leaves behind A–, which can act as a base for the reverse reaction. • An acid and base that differ only by the presence o ...
Are You suprised ?
... The correct arrangement of heat of vaporization of the following compounds is: A) C10H22 > C2H6 > CH4 > C3H8. B) CH4 > C2H6 > C3H8 > C10H22. C) C10H22 > C3H8 > C2H6 > CH4. D) C10H22 > CH4 > C3H8 > C2H6. ...
... The correct arrangement of heat of vaporization of the following compounds is: A) C10H22 > C2H6 > CH4 > C3H8. B) CH4 > C2H6 > C3H8 > C10H22. C) C10H22 > C3H8 > C2H6 > CH4. D) C10H22 > CH4 > C3H8 > C2H6. ...
3. What is the empirical formula of a compound that is
... amount of energy that the body can use per gram of these substances is not the same. The following balanced exothermic reaction represents combustion (respiration) of glucose (a carbohydrate): C6H12O6(s) + 6O2(g) → 6CO2(g) + 6H2O(g) + 2,800 kJ Fats yield much higher energy per unit mass than carbohy ...
... amount of energy that the body can use per gram of these substances is not the same. The following balanced exothermic reaction represents combustion (respiration) of glucose (a carbohydrate): C6H12O6(s) + 6O2(g) → 6CO2(g) + 6H2O(g) + 2,800 kJ Fats yield much higher energy per unit mass than carbohy ...
Chemistry Midterm Review 2006
... b) As the temperature of a gas decreases, the pressure of the gas will _________. c) As the volume of the gas decreases, the pressure of the gas will ___________. d) As the moles of the gas decreases, the pressure of the gas will ____________. e) As the volume of the gas decreases, the moles of the ...
... b) As the temperature of a gas decreases, the pressure of the gas will _________. c) As the volume of the gas decreases, the pressure of the gas will ___________. d) As the moles of the gas decreases, the pressure of the gas will ____________. e) As the volume of the gas decreases, the moles of the ...
Types of Chemical Reactions
... All dozen packages contain 12 objects. • The stationary store uses a package called a ream, which contains 500 sheets of paper. • So what is the chemistry package? Well, it is called the mole (Latin for heap). Each of the above packages contain a number of objects that are convenient to work with, f ...
... All dozen packages contain 12 objects. • The stationary store uses a package called a ream, which contains 500 sheets of paper. • So what is the chemistry package? Well, it is called the mole (Latin for heap). Each of the above packages contain a number of objects that are convenient to work with, f ...
AP Chemistry Chapter 16
... the reaction is the temperature. At temperatures above 100o C the S of the system is greater and the water boils. At temperatures below 100o C the S of the surroundings is greater and the water does not boil Exothermic Reaction -an increase in disorder of the system -major driving force for spon ...
... the reaction is the temperature. At temperatures above 100o C the S of the system is greater and the water boils. At temperatures below 100o C the S of the surroundings is greater and the water does not boil Exothermic Reaction -an increase in disorder of the system -major driving force for spon ...
Chemical reaction
A chemical reaction is a process that leads to the transformation of one set of chemical substances to another. Classically, chemical reactions encompass changes that only involve the positions of electrons in the forming and breaking of chemical bonds between atoms, with no change to the nuclei (no change to the elements present), and can often be described by a chemical equation. Nuclear chemistry is a sub-discipline of chemistry that involves the chemical reactions of unstable and radioactive elements where both electronic and nuclear changes may occur.The substance (or substances) initially involved in a chemical reaction are called reactants or reagents. Chemical reactions are usually characterized by a chemical change, and they yield one or more products, which usually have properties different from the reactants. Reactions often consist of a sequence of individual sub-steps, the so-called elementary reactions, and the information on the precise course of action is part of the reaction mechanism. Chemical reactions are described with chemical equations, which symbolically present the starting materials, end products, and sometimes intermediate products and reaction conditions.Chemical reactions happen at a characteristic reaction rate at a given temperature and chemical concentration. Typically, reaction rates increase with increasing temperature because there is more thermal energy available to reach the activation energy necessary for breaking bonds between atoms.Reactions may proceed in the forward or reverse direction until they go to completion or reach equilibrium. Reactions that proceed in the forward direction to approach equilibrium are often described as spontaneous, requiring no input of free energy to go forward. Non-spontaneous reactions require input of free energy to go forward (examples include charging a battery by applying an external electrical power source, or photosynthesis driven by absorption of electromagnetic radiation in the form of sunlight).Different chemical reactions are used in combinations during chemical synthesis in order to obtain a desired product. In biochemistry, a consecutive series of chemical reactions (where the product of one reaction is the reactant of the next reaction) form metabolic pathways. These reactions are often catalyzed by protein enzymes. Enzymes increase the rates of biochemical reactions, so that metabolic syntheses and decompositions impossible under ordinary conditions can occur at the temperatures and concentrations present within a cell.The general concept of a chemical reaction has been extended to reactions between entities smaller than atoms, including nuclear reactions, radioactive decays, and reactions between elementary particles as described by quantum field theory.